Data di Pubblicazione:
2004
Abstract:
The remote control of lipase PS site- and regioselectivity by substrate
modification has been observed in the acetylation of stevioside (1) and
steviolbioside (2): deglucosylation at position C-19 changed the
acylation site of the sophorose moiety linked at C-13. In fact, while
esterification of 1 gave mainly the corresponding 6''-O-acetylated
derivative, acylation of 2 gave exclusively the 6'-O-monoester. A
possible rationale has been suggested, based on the conformational
behavior of the substrates in different simulated solvents. (C) 2003
Elsevier Ltd. All rights reserved.
modification has been observed in the acetylation of stevioside (1) and
steviolbioside (2): deglucosylation at position C-19 changed the
acylation site of the sophorose moiety linked at C-13. In fact, while
esterification of 1 gave mainly the corresponding 6''-O-acetylated
derivative, acylation of 2 gave exclusively the 6'-O-monoester. A
possible rationale has been suggested, based on the conformational
behavior of the substrates in different simulated solvents. (C) 2003
Elsevier Ltd. All rights reserved.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Colombo, G; Riva, S; Danieli, B
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